The Way I See It > Hatsya Observing Log

Common Names:	Na’ir al Saif, Iota Orionis
Position (J2000):	05h35m26s -05°54'35"
Finder Charts:	30° \| 15° \| 5°
Other Identifiers:	Iot Ori, ι Ori, 44 Ori, STF 752, Σ 752, HD 37043, ADS 4193, BD-06 1241, CCDM J05355-0555, HIP 26241, HR 1899, IDS 05305-0559, SAO 132323, WDS 05354-0555

Hatsya (Iota Orionis) is the southern most and brightest star of the three stars forming the sword in the constellation of Orion. Iota Orionis is also known by the Arabic name Na'ir al Saif, which translates to "the Bright One in the Sword." A class O (O9) giant, Iota Orionis is a multiple star system and has a very close companion that orbits every twenty-nine days, which cannot be resolved in a telescope.

Double/Multiple Star Components

Discoverer	Comp	Mag 1	Mag 2	Sep	PA	Year
STF 752	AB	2.9	7	11.3	141	2002
STF 752	AC	2.9	9.7	49.4	103	2002

Learn more about Hatsya on the web, browse the observing lists containing Hatsya, or review the references used to gather information regarding Hatsya.

Sketches

Iota Orionis at 111x (Sep 8, 2010)

Observations

ID	Description
363	The big eye on the sky - April 1, 2002 01:43 UT In the 203mm SCT at 111x with the 18mm eyepiece, Iot Ori appears as a closely spaced pair. The primary is white colored and the much fainter secondary has a pale green tint. Iot Ori is actually a triple star system, with the other companion appearing to have a purple color.
295	Short winter doubles tour - January 22, 2002 02:01 UT At 121x with the 7.5mm eyepiece in the 114mm reflector, Iot Ori appears as a very closely spaced pair of stars. The secondary star is much fainter than the primary star, which has a bluish tint.
267	Amazing aurora astonishes amateur astronomer - November 6, 2001 05:21 UT With the 17mm (74x) eyepiece in the ETX-90, Iot Ori appears as a closely spaced pair. The bright primary is white. The much fainter secondary may have a blue tint, but the color kept coming and going.